added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
targets/cmsis/TARGET_ARM_SSG/TARGET_MPS2_M7/system_CMSDK_CM7.c@147:ba84b7dc41a7, 2016-09-10 (annotated)
- Committer:
- JojoS
- Date:
- Sat Sep 10 15:32:04 2016 +0000
- Revision:
- 147:ba84b7dc41a7
- Parent:
- 144:ef7eb2e8f9f7
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
<> | 144:ef7eb2e8f9f7 | 1 | /* MPS2 CMSIS Library |
<> | 144:ef7eb2e8f9f7 | 2 | * |
<> | 144:ef7eb2e8f9f7 | 3 | * Copyright (c) 2006-2016 ARM Limited |
<> | 144:ef7eb2e8f9f7 | 4 | * All rights reserved. |
<> | 144:ef7eb2e8f9f7 | 5 | * |
<> | 144:ef7eb2e8f9f7 | 6 | * Redistribution and use in source and binary forms, with or without |
<> | 144:ef7eb2e8f9f7 | 7 | * modification, are permitted provided that the following conditions are met: |
<> | 144:ef7eb2e8f9f7 | 8 | * |
<> | 144:ef7eb2e8f9f7 | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
<> | 144:ef7eb2e8f9f7 | 10 | * this list of conditions and the following disclaimer. |
<> | 144:ef7eb2e8f9f7 | 11 | * |
<> | 144:ef7eb2e8f9f7 | 12 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
<> | 144:ef7eb2e8f9f7 | 13 | * this list of conditions and the following disclaimer in the documentation |
<> | 144:ef7eb2e8f9f7 | 14 | * and/or other materials provided with the distribution. |
<> | 144:ef7eb2e8f9f7 | 15 | * |
<> | 144:ef7eb2e8f9f7 | 16 | * 3. Neither the name of the copyright holder nor the names of its contributors |
<> | 144:ef7eb2e8f9f7 | 17 | * may be used to endorse or promote products derived from this software without |
<> | 144:ef7eb2e8f9f7 | 18 | * specific prior written permission. |
<> | 144:ef7eb2e8f9f7 | 19 | * |
<> | 144:ef7eb2e8f9f7 | 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
<> | 144:ef7eb2e8f9f7 | 21 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
<> | 144:ef7eb2e8f9f7 | 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
<> | 144:ef7eb2e8f9f7 | 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
<> | 144:ef7eb2e8f9f7 | 24 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
<> | 144:ef7eb2e8f9f7 | 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
<> | 144:ef7eb2e8f9f7 | 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
<> | 144:ef7eb2e8f9f7 | 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
<> | 144:ef7eb2e8f9f7 | 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
<> | 144:ef7eb2e8f9f7 | 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
<> | 144:ef7eb2e8f9f7 | 30 | * POSSIBILITY OF SUCH DAMAGE. |
<> | 144:ef7eb2e8f9f7 | 31 | ******************************************************************************* |
<> | 144:ef7eb2e8f9f7 | 32 | * @file system_CMSDK_CM7.c |
<> | 144:ef7eb2e8f9f7 | 33 | * @brief CMSIS Device System Source File for |
<> | 144:ef7eb2e8f9f7 | 34 | * CMSDK_CM7 Device |
<> | 144:ef7eb2e8f9f7 | 35 | * |
<> | 144:ef7eb2e8f9f7 | 36 | *******************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 37 | |
<> | 144:ef7eb2e8f9f7 | 38 | |
<> | 144:ef7eb2e8f9f7 | 39 | #if defined (CMSDK_CM7) |
<> | 144:ef7eb2e8f9f7 | 40 | #include "CMSDK_CM7.h" |
<> | 144:ef7eb2e8f9f7 | 41 | #elif defined (CMSDK_CM7_SP) |
<> | 144:ef7eb2e8f9f7 | 42 | #include "CMSDK_CM7_SP.h" |
<> | 144:ef7eb2e8f9f7 | 43 | #elif defined (CMSDK_CM7_DP) |
<> | 144:ef7eb2e8f9f7 | 44 | #include "CMSDK_CM7_DP.h" |
<> | 144:ef7eb2e8f9f7 | 45 | #else |
<> | 144:ef7eb2e8f9f7 | 46 | #error device not specified! |
<> | 144:ef7eb2e8f9f7 | 47 | #endif |
<> | 144:ef7eb2e8f9f7 | 48 | |
<> | 144:ef7eb2e8f9f7 | 49 | /*---------------------------------------------------------------------------- |
<> | 144:ef7eb2e8f9f7 | 50 | Define clocks |
<> | 144:ef7eb2e8f9f7 | 51 | *----------------------------------------------------------------------------*/ |
<> | 144:ef7eb2e8f9f7 | 52 | #define __XTAL (50000000UL) /* Oscillator frequency */ |
<> | 144:ef7eb2e8f9f7 | 53 | |
<> | 144:ef7eb2e8f9f7 | 54 | #define __SYSTEM_CLOCK (__XTAL / 2) |
<> | 144:ef7eb2e8f9f7 | 55 | |
<> | 144:ef7eb2e8f9f7 | 56 | |
<> | 144:ef7eb2e8f9f7 | 57 | /*---------------------------------------------------------------------------- |
<> | 144:ef7eb2e8f9f7 | 58 | System Core Clock Variable |
<> | 144:ef7eb2e8f9f7 | 59 | *----------------------------------------------------------------------------*/ |
<> | 144:ef7eb2e8f9f7 | 60 | uint32_t SystemCoreClock = __SYSTEM_CLOCK;/* System Core Clock Frequency */ |
<> | 144:ef7eb2e8f9f7 | 61 | |
<> | 144:ef7eb2e8f9f7 | 62 | |
<> | 144:ef7eb2e8f9f7 | 63 | /*---------------------------------------------------------------------------- |
<> | 144:ef7eb2e8f9f7 | 64 | Clock functions |
<> | 144:ef7eb2e8f9f7 | 65 | *----------------------------------------------------------------------------*/ |
<> | 144:ef7eb2e8f9f7 | 66 | /** |
<> | 144:ef7eb2e8f9f7 | 67 | * Update SystemCoreClock variable |
<> | 144:ef7eb2e8f9f7 | 68 | * |
<> | 144:ef7eb2e8f9f7 | 69 | * @param none |
<> | 144:ef7eb2e8f9f7 | 70 | * @return none |
<> | 144:ef7eb2e8f9f7 | 71 | * |
<> | 144:ef7eb2e8f9f7 | 72 | * @brief Updates the SystemCoreClock with current core Clock |
<> | 144:ef7eb2e8f9f7 | 73 | * retrieved from cpu registers. |
<> | 144:ef7eb2e8f9f7 | 74 | */ |
<> | 144:ef7eb2e8f9f7 | 75 | void SystemCoreClockUpdate (void) |
<> | 144:ef7eb2e8f9f7 | 76 | { |
<> | 144:ef7eb2e8f9f7 | 77 | |
<> | 144:ef7eb2e8f9f7 | 78 | SystemCoreClock = __SYSTEM_CLOCK; |
<> | 144:ef7eb2e8f9f7 | 79 | |
<> | 144:ef7eb2e8f9f7 | 80 | } |
<> | 144:ef7eb2e8f9f7 | 81 | |
<> | 144:ef7eb2e8f9f7 | 82 | /** |
<> | 144:ef7eb2e8f9f7 | 83 | * Initialize the system |
<> | 144:ef7eb2e8f9f7 | 84 | * |
<> | 144:ef7eb2e8f9f7 | 85 | * @param none |
<> | 144:ef7eb2e8f9f7 | 86 | * @return none |
<> | 144:ef7eb2e8f9f7 | 87 | * |
<> | 144:ef7eb2e8f9f7 | 88 | * @brief Setup the microcontroller system. |
<> | 144:ef7eb2e8f9f7 | 89 | * Initialize the System. |
<> | 144:ef7eb2e8f9f7 | 90 | */ |
<> | 144:ef7eb2e8f9f7 | 91 | void SystemInit (void) |
<> | 144:ef7eb2e8f9f7 | 92 | { |
<> | 144:ef7eb2e8f9f7 | 93 | #if (__FPU_USED == 1) |
<> | 144:ef7eb2e8f9f7 | 94 | SCB->CPACR |= ((3UL << 10*2) | /* set CP10 Full Access */ |
<> | 144:ef7eb2e8f9f7 | 95 | (3UL << 11*2) ); /* set CP11 Full Access */ |
<> | 144:ef7eb2e8f9f7 | 96 | #endif |
<> | 144:ef7eb2e8f9f7 | 97 | |
<> | 144:ef7eb2e8f9f7 | 98 | #ifdef UNALIGNED_SUPPORT_DISABLE |
<> | 144:ef7eb2e8f9f7 | 99 | SCB->CCR |= SCB_CCR_UNALIGN_TRP_Msk; |
<> | 144:ef7eb2e8f9f7 | 100 | #endif |
<> | 144:ef7eb2e8f9f7 | 101 | |
<> | 144:ef7eb2e8f9f7 | 102 | SystemCoreClock = __SYSTEM_CLOCK; |
<> | 144:ef7eb2e8f9f7 | 103 | |
<> | 144:ef7eb2e8f9f7 | 104 | } |